Jamba2
Jamba2 is an AI21 language-model release. Jamba2 is an enterprise-focused release emphasizing grounded answers and instruction adherence with concise outputs. Dense 3B and sparse Mini tiers share the hybrid design and 256K context. Both release under Apache 2.0, expanding commercial weight access relative to the custom-licensed 1.x instruction models. Public weights and AI21 Studio support local and hosted deployment. Long context does not guarantee complete retrieval or factual correctness, and deployed throughput depends on hardware, precision, and prompt length.
2026-01-08
3B dense; Mini 52B total, 12B active
Hybrid Mamba state-space / Transformer; MoE in larger tiers
Apache-2.0
Specifications
- Parameters
- 3B dense; Mini 52B total, 12B active
- Architecture
- Hybrid Mamba state-space / Transformer; MoE in larger tiers
- License
- Apache-2.0
- Context Window
- 262,144 tokens
- Type
- text
- Modalities
- text
Benchmark Scores
Advanced Specifications
- Model Family
- Jamba
- API Access
- Available
- Chat Interface
- Not Available
- Variants
- 3BMini
Capabilities & Limitations
- Capabilities
- text generationlong contextinstruction following
- Known Limitations
- Long-input quality requires task evaluationLicense and weight footprint vary by tier
- Notable Use Cases
- enterprise question answeringdocument assistantsprivate deployment